Definition of clamshell
1 : the shell of a clam
2a : a bucket or grapple (as on a dredge) having two hinged jawsb : an excavating machine having a clamshellc : either of a pair of doors (as in an airplane tail) that open out and away from each otherd : a hinged container, case, or cover that opens like the shell of a clam
First Known Use of clamshell
Seen and Heard
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